Five Dell servers running AMD's Quad-Core Opteron processors are available on the company's US website, bringing the number of server models that use the chip to 13, AMD said.

The announcement is further evidence that AMD's troubled quad-core processor is back on track, following months of production delays and a bug discovered last year that further postponed the chip's release. Last week, AMD revealed it had begun shipping the processors, which had already found their way into systems available from HP.

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The five Dell server models based on the Quad-Core Opteron that are now available are the PowerEdge SC1435, 2970, M605, 6950, and T605. The servers are available in rack and tower models aimed at a range of corporate users, from small business to large corporations.

The availability of servers based on the Quad-Core Opteron is a boost for AMD, but the company still faces significant hurdles and recently announced plans to trim its workforce by 10 percent. At the same time, the company cut its revenue forecast for the first quarter.